Windows Live Messenger
Windows Live Messenger (WLM), still commonly referred to by the previous name of MSN Messenger (MSN for short), is an instant messaging client for Windows XP, Windows Server 2003, Windows Vista, and Windows Mobile, first released on December 13, 2005 by Microsoft. It is part of Microsoft's Windows Live set of online services.
With MSN Messenger you can chat online instantly in real time with friends, family and colleagues. It's faster than e-mail, more discreet than a phone call.
Chat using a webcam, send text messages to mobile phones, and express yourself instantly online in real time with new, cool emoticons.
MSN Messenger looks like you! Sign in with your own picture, create your own emoticons, and represent yourself with new, cool backgrounds!